Display apparatus and driving method thereof

ABSTRACT

A display apparatus and a driving method thereof capable of assuring reliability in frame inversion driving and improving cinema video image quality are provided. To accomplish this, a display apparatus of the embodiment replaces at least one of a plurality of frame images obtained by doubling the frame rate, with a different image before display. Specifically, the display apparatus replaces at least one of the double-speed converted plural frame images with a high-frequency emphasized image and at least one with a low-frequency component image, and displays the frame images. Furthermore, the display apparatus replaces an image at the border between cinema images with a different image before displaying.

This application is a continuation of application Ser. No. 12/475,926,filed on Jun. 1, 2009.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to display apparatuses and, particularly,relates to display apparatuses of frame inversion (field inversion)driving schemes, and driving methods thereof.

Description of the Related Art

In a liquid-crystal display apparatus, burn-in occurs under applicationof a DC voltage; thus, it is necessary to apply an electrical fieldwhose polarity is inverted between positive and negative on afield-by-field basis. Examples of a driving scheme in which the polarityof the applied electrical field is inverted on a field-by-field basisinclude the following:

(1) a scheme in which driving is performed with a uniform polarity forthe entire display screen, and the polarity is inverted on afield-by-field basis;

(2) a scheme in which driving is performed by inverting the polarity ona line-by-line basis, and the polarity is inverted on a field-by-fieldbasis; and

(3) a scheme in which driving is performed by inverting the polarity ona pixel-by-pixel basis, and the polarity is inverted on a field-by-fieldbasis.

An example of a liquid-crystal display apparatus that performs suchfield inversion drive is the liquid-crystal display apparatus disclosedin Japanese Patent Laid-Open No. 11-133376. Japanese Patent Laid-OpenNo. 11-133376 discloses a liquid-crystal display apparatus that enablesflicker-free adjustment of the common electrode voltage by a methodother than by increasing the driving speed. Specifically, such aliquid-crystal display apparatus switches between inverting the polarityof video signals input into the respective pixel electrodes on afield-by-field basis and inverting the polarity every n number of fields(n is a positive integer other than “1”).

However, such a conventional technique has the following problems. Forexample, a liquid-crystal display apparatus that performs the aboveframe (field) inversion driving cannot achieve the display ofhigh-quality cinema video and take measures to assure reliability of theliquid-crystal display apparatus. Also, when 24 Hz cinema video istelecine-converted to 60 Hz interlaced signals or progressive signals(2-3 pull down), the same image continues for two or three frames in theconverted video, producing discontinuous motion.

SUMMARY OF THE INVENTION

The present invention enables realization of a display apparatus thatimproves the image quality of cinema video, while assuring reliabilityin a frame inversion drive, and a driving method thereof.

One aspect of the present invention provides a display apparatus,comprising: an input unit configured to input an image to be displayed;a determination unit configured to determine whether the input image isan image obtained by a 2-3 pull down method; an I/P conversion unitconfigured to, when the input image is an image obtained by the 2-3 pulldown method, convert the input image from an interlaced image to aprogressive image; a double speed frame unit configured to convert, whenthe input image is an image obtained by the 2-3 pull down method, framesof the progressive image converted by the I/P conversion unit; and adisplay unit configured to replace at least one of frame imagesconverted by the double speed frame unit with a different image, anddisplay the frame images while inverting the electrical polarity thereofon a frame-by-frame basis.

Another aspect of the present invention provides a method for driving adisplay apparatus, the method comprising: inputting an image to bedisplayed; converting each frame of the input image into a plurality offrame images; and replacing at least one of the plurality of frameimages with a different image, and displaying the frame images whileinverting the electrical polarity thereof on a frame-by-frame basis.

Further features of the present invention will become apparent from thefollowing description of exemplary embodiments (with reference to theattached drawings).

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing an exemplary configuration of aliquid-crystal display apparatus according to a first embodiment.

FIG. 2 is a circuit diagram illustrating the operation of a motioncorrection processing unit 115 according to the first embodiment.

FIG. 3 illustrates a processing flow of a driving process of doublespeed frame inversion and a motion improvement drive according to thefirst embodiment.

FIG. 4 illustrates a processing flow of a driving process of doublespeed frame inversion and a motion improvement drive according to asecond embodiment.

FIG. 5 illustrates a black inserting process as a comparative example.

FIG. 6 illustrates a black inserting process according to a thirdembodiment.

FIG. 7 illustrates a process called overdrive as a comparative example.

FIG. 8 illustrates a process called overdrive according to a fourthembodiment.

DESCRIPTION OF THE EMBODIMENTS

Embodiments of the present invention will now be described in detailwith reference to the drawings. It should be noted that the relativearrangement of the components, the numerical expressions and numericalvalues set forth in these embodiments do not limit the scope of thepresent invention unless it is specifically stated otherwise.

First Embodiment

A first embodiment will be described below with reference to FIG. 1 toFIG. 3. FIG. 1 is a block diagram showing an exemplary configuration ofa liquid-crystal display apparatus according to the first embodiment.Blocks relating to the present invention will be mainly describedherein. Therefore, the configuration of a liquid-crystal displayapparatus of the present invention may include other blocks. In thefollowing description, a liquid-crystal display apparatus is used as anexample of the display apparatus.

A liquid-crystal display apparatus 100 includes a video input terminal101, an A/D converter 102, an I/P converter 103, a scaler 104, a doublespeed frame unit 105, memories 106 and 107, an inverting amplifiercircuit 108, a non-inverting amplifier circuit 109, a polarity switchingcircuit 110, a liquid-crystal panel 111, an input timing generating unit112, an output timing generating unit 113, a 2-3 pull down detectionunit 114 and a motion correction processing unit 115.

The video input terminal 101 receives an original cinema image as inputto be displayed in the liquid-crystal panel 111, for example. The image(image signals) input through the video input terminal 101 is input intothe A/D converter 102 and undergoes A/D conversion. The A/D-convertedimage signals are input into the I/P converter 103 so as to be convertedfrom an interlaced signal to a progressive signal. Here, “interlaced”refers to first performing display with every other scanning line in theliquid-crystal panel 111 from top to bottom, and thereafter performingdisplay with the remaining scanning lines from top to bottom. That is,“interlaced” refers to a display method in which a screen of a singleframe is displayed through two repetitions of a drawing operation.Additionally, “progressive” means a so-called non-interlaced state, andrefers to a display method in which a screen of a single frame isdisplayed through one repetition of a drawing operation.

The scaler 104 performs a resolution conversion process such asmagnification/reduction so that the resolution of the I/P-convertedimage signals matches that of the liquid-crystal panel 111. The doublespeed frame unit 105 converts one frame in the input image (screen) intoa plurality of frames. For example, the double speed frame unit 105doubles the frame rate in the image signals output from the scaler 104.The resultant image signals are written into the memories 106 and 107.

The motion correction processing unit 115 replaces at least one of aplurality of frame images with a different image. Also, in the presentembodiment, the motion correction processing unit 115 classifies imagesignals output from the double speed frame unit 105 into image signalsin which a high-frequency component is emphasized and image signalscomposed of a low-frequency component, and outputs the classifiedsignals to the inverting amplifier circuit 108 and the non-invertingamplifier circuit 109. The inverting amplifier circuit 108 and thenon-inverting amplifier circuit 109 amplify the input image signals tothe signal level suited to drive the liquid-crystal panel 111. Thepolarity switching circuit 110 switches the electrical polarity of theimage signals output from the inverting amplifier circuit 108 and thenon-inverting amplifier circuit 109 so as to alternate between positivepolarity and negative polarity, and outputs the image signals to theliquid-crystal panel 111.

The 2-3 pull down detection unit 114 detects the periodical pattern of astatic field in an image signal, determines whether that image signalcorresponds to a telecine-converted image, and outputs the detectionresult information. The input timing generating unit 112 outputs, asshown in FIG. 1, information for inputting image signals to the blocksconnected via the signal line. Each of the blocks receives image signalsin accordance with this information. In contrast, the output timinggenerating unit 113 outputs information for outputting image signalsfrom each of the blocks.

Next, the motion correction processing unit 115 will be described indetail with reference to FIG. 2. FIG. 2 is a circuit diagramillustrating the operation of the motion correction processing unit 115according to the first embodiment. The motion correction processing unit115 classifies the image signals output from the double speed frame unit105 into those images in which a high-frequency component is emphasizedand those images composed of a low-frequency component, and outputsthese images alternately.

The motion correction processing unit 115 includes input terminals 221and 222, a low-pass filter 223, a subtracter 224, multipliers 225, 227and 228, an adder 226, a selector 229 and an output terminal 210. Theinput terminal 221 receives as input an image (video) signal output fromthe double speed frame unit 105. Also, the input terminal 222 receivesas input a selection signal for switching between an image in which ahigh-frequency component is emphasized and an image composed of alow-frequency component and outputting the selected images. Thisselection signal is output by, for example, the output timing generatingunit 113.

The image (video) signal output from the double speed frame unit 105 isinput via the input terminal 221, and a low-frequency image is extractedas a result of the high-frequency component being removed with the useof the low-pass filter 223. The low-frequency image is multiplied by apredetermined coefficient K3 in the multiplier 228, and is outputthrough switching by the selector 229.

In addition, the image signal input from the input terminal 221 is inputinto the subtracter 224, and the output signal from the low-pass filter223 is subtracted. As a result, the motion correction processing unit115 extracts a high-frequency component image. Furthermore, thehigh-frequency component image is multiplied by a predeterminedcoefficient K1 in the multiplier 225, and in the adder 226 the originalimage input from the input terminal 221 is added to the resultant image.In this manner, the motion correction processing unit 115 acquires ahigh-frequency emphasized image obtained by adding the high-frequencycomponent image to the original image. Thereafter, the high-frequencyemphasized image is multiplied by a predetermined coefficient K2 in themultiplier 227, and is output via the selector 229.

In the present embodiment, a processing method will be described whichis employed in a case where a video is input whose signals have beenconverted by telecine conversion (2-3 pull down) to 60 Hz interlacedsignals such as an NTSC signal. The driving process of double speedframe inversion and the motion improvement drive performed on a telecineimage will be described with reference to FIG. 3.

FIG. 3 illustrates the processing flow of a driving process of doublespeed frame inversion and a motion improvement drive according to thefirst embodiment. Here, a case will be described as an example in whichthe driving process of double speed frame inversion and the motionimprovement drive are performed on 60 Hz interlaced telecine imagesignals.

Herein, reference numeral 3 a indicates original cinema images.Reference numeral 3 b indicates telecine-converted signals input fromthe video input terminal 101. 3 c indicates I/P-converted image signalsoutput from the I/P converter 103. 3 d indicates writing into the memory106 by the double speed frame unit 105. 3 e indicates writing into thememory 107 by the double speed frame unit 105. 3 f indicates readingfrom the memory 106 by the double speed frame unit 105. 3 g indicatesreading from the memory 107 by the double speed frame unit 105. 3 hindicates output from the motion correction processing unit 115. 3 iindicates output from the polarity switching circuit 110, which servesas the drive signal for the liquid-crystal panel 111. Also, 301 and 302indicate cinema images. 303 to 307 indicate interlaced images. 308 to312 indicate progressive images. 313 to 317 indicate progressive imageswritten into the memory 106 or the memory 107.

As shown with 3 a, the image signal of the original cinema video iscomposed of 24 frame images per second, and the image is updated at 24Hz. In the case where cinema video is telecine-converted into 60 Hzinterlaced signals such as an NTSC signal, a method called 2-3 pull downis used. The 2-3 pull down method converts the frame rate from 24 Hz to60 Hz by alternately repeating a single image of the cinema video twotimes and repeating three times, as shown with 3 b. Furthermore, it ispossible to acquire telecine-converted interlaced signals by readingsignals alternately from even-numbered lines and odd-numbered lines foreach 60 Hz frame.

The above-described telecine-converted interlaced signals are input intothe A/D converter 102 through the video input terminal 101. The A/Dconverter 102 performs A/D conversion on the input image signals andthen input the image signals to the I/P converter 103. Herein, as shownin FIG. 1, the 2-3 pull down detection unit 114 detectstelecine-converted 60 Hz interlaced signals obtained by 2-3 pull down.

In an image (film image) converted by 2-3 pull down, a static fieldappears every five fields. The 2-3 pull down detection unit 114 detectsthis periodic pattern and determines if an image is a film image(telecine-converted image) or a general image, and outputs the detectionresult information. For example, with 3 b, the images 305 and 307, whichare generated based on the cinema image 302, are the same image, andtherefore the 2-3 pull down detection unit 114 determines the presenceof the static field and detects the 2-3 pull down phase.

Based on the phase detected by the 2-3 pull down detection unit 114, asshown with 3 c, the progressive images 308 and 309 are generated fromthe interlaced images 303 and 304 in the I/P converter 103. Also, theprogressive images 310, 311 and 312 are generated from the interlacedimages 305 and 306.

IP-converted image signals are input into the scaler 104, where aresolution conversion process is performed in which the image ismagnified/reduced so that the resolution of the input image matches theresolution for display in the liquid-crystal panel 111. The imagesignals output from the scaler 104 are input into the double speed frameunit 105, where the frame rate thereof is doubled.

IP-converted progressive images 308 to 312 are, through the scaler 104,written into the memory 106 and the memory 107 alternately by the doublespeed frame unit 105 as shown with 3 d and 3 e. Note that 3 d and 3 eshow the timing for the double speed frame unit 105 to write images intothe memory 106 and the memory 107. Data pieces are alternately writteninto the memory 106 and the memory 107 on a frame-by-frame basis. 3 fand 3 g show the timing for the double speed frame unit 105 to read datapieces from the memory 106 and the memory 107.

As shown with 3 f and 3 g, the double speed frame unit 105 reads outdata written into the memory 106 twice at a frame rate double that atthe time of writing, so as to output the same image twice in succession.Thereafter, the double speed frame unit 105 reads out data written intothe memory 107 twice in succession. In this manner, by reading out datafrom the memories at double speed and reading out images for two framesduring a period corresponding to that for writing one frame, it ispossible to double the frame rate of the input image.

Images 318 to 327 obtained by the double speed frame unit 105 doublingthe frame rate are input into the motion correction processing unit 115.The motion correction processing unit 115, as shown with 3 h, convertsimages 328 and 332, which are the initial frame images after a cinemaimage is switched to another, into images in which a high-frequencycomponent is emphasized, and converts the images 331 and 337, which arethe last frame images of the successive five frames, into imagescomposed of a low-frequency component only.

The images 328 to 337 output from the motion correction processing unit115 are input into the inverting amplifier circuit 108 and thenon-inverting amplifier circuit 109, and after being amplified to asignal level suited to drive the liquid-crystal panel 111, are inputinto the polarity switching circuit 110. As shown with 3 i, the polarityof the respective signals of the images whose frame rate has beendoubled are switched so as to alternate between positive and negativerelative to the common electrode voltage of the liquid-crystal panel,and the signals are output. In this manner, by alternately outputtingimages having a positive and negative polarity, flicker-free display canbe achieved.

As described above, the display apparatus according to the presentembodiment replaces at least one of a plurality of frame images whoseframe rate has been doubled with a different image, before displayingthem. Specifically, the display apparatus according to the presentembodiment replaces at least one of a plurality of frame images whoseframe rate has been doubled with a high-frequency emphasized image andat least one of the frame images with a low-frequency component image.Furthermore, the display apparatus according to the present embodimentdisplays an image for which a motion correction process has beenperformed on the images at the border between cinema images. It isthereby possible to achieve a display apparatus that can improve motionblur. Also setting the display refresh rate to 120 Hz with respect tothe input at 60 Hz enables flickers to be made undetectable to the eyeeven during frame inversion driving in which the drive polarity isinverted on a frame-by-frame basis, thereby enabling flicker-free highimage quality display. In this manner, the present embodiment canprovide a display apparatus that achieves both countermeasures forburn-in, flickers or the like caused by the frame inversion drive andhigh image quality display of cinema video. Also, while examples of thescheme for driving frames by inverting the drive polarity on aframe-by-frame basis include the following, the present embodiment canbe applied to all of them; (1) a scheme in which driving is performedwith a uniform polarity for the entire display screen, and the polarityis inverted on a frame-by-frame basis; (2) a scheme in which driving isperformed by inverting the polarity on a line-by-line basis, and thepolarity is inverted on a frame-by-frame basis; and (3) a scheme inwhich driving is performed by inverting the polarity on a pixel-by-pixelbasis, and the polarity is inverted on a frame-by-frame basis.

Second Embodiment

Next, a second embodiment will be described with reference to FIG. 4. Inthe present embodiment, a liquid-crystal display apparatus that performsdouble speed frame processing, capable of improving the motion intelecine images, thereby achieving high image quality display, andimproving the polarization of a DC component during AC driving will bedescribed.

In the first embodiment, while motion blur due to the image holdingproperties of cinema video is improved, 2-3 patterns undergo doublespeed frame processing as is, and therefore discontinuous motion pictureremains, which is generated by the repetition of patterns made up ofdifferent numbers of images. In other words, sets of two images or threeimages, the two or three images being generated from a single cinemaimage, undergo double speed frame processing as is. Accordingly, afterthe double speed frame processing, as shown with 3 h in FIG. 3, sets offour images and six images are alternately repeated. For this reason,there may be a case in which a viewer feels the motion in images whichdisplay a continuous motion to be unnatural, and image quality isreduced. In the present embodiment, a method of improving suchreductions in the image quality due to discontinuous motion will bedescribed.

FIG. 4 illustrates a processing flow of the driving process of doublespeed frame inversion and the motion improvement drive according to asecond embodiment. Herein, a processing flow for a telecine image isdescribed for the case in which the 2-3 pull down detection unit 114 hasdetermined that an image is a telecine image and has detected the phaseof the 2-3 pull down. Note that in the following description, portionsdifferent from FIG. 3 will be mainly described.

Here, 4 a indicates original cinema images. 4 b indicatestelecine-converted signals input from the video input terminal 101. 4 cindicates I/P-converted image signals output from the I/P converter 103.4 d indicates writing into the memory 106 by the double speed frame unit105. 4 e indicates writing into the memory 107 by the double speed frameunit 105. 4 f indicates reading from the memory 106 by the double speedframe unit 105. 4 g indicates reading from the memory 107 by the doublespeed frame unit 105. 4 h indicates output from the motion correctionprocessing unit 115. 4 i indicates output from the polarity switchingcircuit 110, which serves as a drive signal for the liquid-crystal panel111. Also, 401 and 402 indicate cinema images. 403 to 407 indicateinterlaced images. 408 to 412 indicate progressive images. 413 to 417indicate progressive images written into the memory 106 or the memory107.

According to the present embodiment, in the case where the 2-3 pull downdetection unit 114 determines an image as a telecine image, the doublespeed frame unit 105 reads out data from the memories 106 and 107 asshown with 4 f and 4 g. Specifically, an image A is read out for twoframes (418 and 419) from the memory 106, and thereafter the image A isread out successively for three frames (420, 421 and 422) from thememory 107. By shifting the timing for reading out data from the memory106 by one frame, an image B is read out for one frame (423) from thememory 106, and the image B is read out for two frames (424 and 425)from the memory 107. After that, the image B is read out from for twoframes (426 and 427) from the memory 106.

By reading out data as described above, the image A (418 to 422) andimage B (423 to 427) are respectively arranged into five frames. Thisenables a succession of images in the same number of frames, so highquality video with smooth motion can be obtained. The images whose framerate has been doubled by the double speed frame unit 105 are input intothe motion correction processing unit 115.

The motion correction processing unit 115, as shown with 4 h, convertsframe images 428 and 433, which are the initial frame images after acinema image switches to another, into images in which a high-frequencycomponent is emphasized, and converts the frame images 432 and 437,which are the last frame images of the successive five frames, intoimages composed of a low-frequency component only.

As shown with 4 i, of the successive five frames of images 438 to 442,the image 438 in which a high-frequency component is emphasized and theimage 442 composed of a low-frequency component are driven on thepositive polarity side. Conversely, of the successive five frames ofimages 443 to 447, the image 443 in which a high-frequency component isemphasized and the image 447 composed of a low-frequency component aredriven on the negative polarity side. As a result, the polarity to drivethe images that have been converted by the motion correction processingunit 115 is inversed every successive five frames, so the polarizationof DC components is canceled, thereby improving reductions inreliability such as burn-in.

In the present embodiment, a case is described in which NTSC interlacedsignals are input. However, a similar process can be applied for thecase in which progressive signals are input, simply by removing the I/Pconversion process. In such a case, the I/P-converted signals in FIG. 3and FIG. 4 shall be progressive signals.

Also, although a case is described in which analog signals are input inthe present embodiment, the invention can be applied to the case inwhich digital signals such as DVI are input as well. Also, although thecase described in the present embodiment uses two memories, there is nolimitation to this, and it is possible to use one memory, dividing thestorage area thereof.

Third Embodiment

The third embodiment will be described next with reference to FIG. 5 andFIG. 6. In the present embodiment, a case is described in which a blackinserting process is used as a motion correction process. The blackinserting process refers to processing in which an image of a uniformtone (a black image, for example) is inserted into the frames whoseframe rate has been doubled.

FIG. 5 illustrates a black inserting process as a comparative example.Reference numeral 5 a indicates images read out from the memories 106and 107 by the double speed frame unit 105. Reference numeral 5 bindicates output from the polarity switching circuit.

As shown in FIG. 5, in a comparative example, the black image isinserted on the latter of the frames obtained by doubling the framerate. In this case, a black image is inserted only on the negativepolarity side, and therefore the DC component is polarized on thenegative polarity side, thereby causing a reduction in reliability suchas burn-in.

FIG. 6 illustrates a black inserting process according to a thirdembodiment. Reference numeral 6 a indicates images read out from thememories 106 and 107 by the double speed frame unit 105. Referencenumeral 6 b indicates output from the polarity switching circuit.

As shown in FIG. 6, in the present embodiment, the 2-3 pattern of theinput signals is converted into a 5-5 pattern after the frame rate isdoubled, and the black inserting process is performed at the borderbetween the 5-5 patterns. Accordingly, the polarity of the frame onwhich the black inserting process is performed is inverted everysuccessive five frames, so the polarization of DC components isimproved. At the same time, since images are switched every successivefive frames, a reduction in the image quality due to discontinuousmotion picture display will not occur.

Fourth Embodiment

Next, the fourth embodiment shall be described with reference to FIG. 7and FIG. 8. In the present embodiment, a case is described as anexample, in which at least one of frame images is replaced with an imageprocessed by overdrive as a motion correction process.

FIG. 7 illustrates the process called overdrive as a comparativeexample. Reference numeral 7 a indicates images read out from thememories 106 and 107 by the double speed frame unit 105. Referencenumeral 7 b indicates output from the polarity switching circuit.

In the comparative example, overdrive is performed on a frame of 4-6pattern video obtained by doubling the frame rate, the images beingswitched at that frame. In this case, since overdrive is performed onlyon the positive polarity side, the DC components are polarized, causinga reduction in reliability such as burn-in.

FIG. 8 illustrates the process called overdrive according to the fourthembodiment. Reference numeral 8 a indicates images read out from thememories 106 and 107 by the double speed frame unit 105. Referencenumeral 8 b indicates output by the polarity switching circuit.

In the present embodiment, the input signals of the 2-3 pattern areconverted into the 5-5 pattern after doubling the frame rate, andoverdrive is performed at the border between the 5-5 patterns.Accordingly, the polarity of the frame on which overdrive is performedis inverted every five frames, so the polarization of DC components isimproved. At the same time, since images are switched every successivefive images, reductions in the image quality due to discontinuous motionpicture display will not occur.

While the present invention has been described with reference toexemplary embodiments, it is to be understood that the invention is notlimited to the disclosed exemplary embodiments. The scope of thefollowing claims is to be accorded the broadest interpretation so as toencompass all such modifications and equivalent structures andfunctions.

This application claims the benefit of Japanese Patent Application No.2008-155883 filed on Jun. 13, 2008, which is hereby incorporated byreference herein in its entirety.

What is claimed is:
 1. A display control apparatus comprising: an inputunit configured to input images: a determining unit configured todetermine whether the input images are obtained by performing a 2-3 pulldown processing on cinema images; an obtaining unit configured to obtainimages having a higher frame rate than the input images based onpredetermined processing on the input images; a specifying unitconfigured to specify, from among a first plurality of images obtainedby the obtaining unit based on a first cinema image, (a) a first imageused to generate a first low-frequency component image and (b) a secondimage used to generate a first high-frequency component image, and tospecify, from among a second plurality of images obtained by theobtaining unit based on a second cinema image which is next to the firstcinema image, (a) a third image used to generate a second low-frequencycomponent image and (b) a fourth image used to generate a secondhigh-frequency component image, in a case where the determining unit hasdetermined that the input images are obtained by performing the 2-3 pulldown processing on the cinema images, wherein a number of the firstplurality of images and a number of the second plurality of images aredifferent from each other; a first generation unit configured togenerate the first low-frequency component image using the first imagespecified by the specifying unit and to generate the secondlow-frequency component image using the third image specified by thespecifying unit; a second generation unit configured to generate thefirst high-frequency component image using the second image specified bythe specifying unit and to generate the second high-frequency componentimage using the fourth image specified by the specifying unit; and adisplay control unit configured to control a display unit to display aplurality of images including the first and second low-frequencycomponent images generated by the first generation unit and the firstand second high-frequency component images generated by the secondgeneration unit.
 2. The display control apparatus according to claim 1,further comprising a frame rate improvement unit configured to improve aframe rate of images obtained based on predetermined processing on theinput images, wherein the first generation unit generates alow-frequency component image from at least one of the images of whichthe frame rate is improved by the frame rate improvement unit, and thesecond generation unit generates a high-frequency component image basedon at least one of the images of which the frame rate is improved by theframe rate improvement unit.
 3. The display control apparatus accordingto claim 1, wherein the display control unit controls the display unitto invert an electrical polarity of the display unit on a frame-by-framebasis.
 4. The display control apparatus according to claim 1, whereinthe input unit inputs an odd number of images corresponding to onecinema image, and the first generation unit generates the first andsecond low-frequency component images and the second generation unitgenerates the first and second high-frequency component images based onthe obtained images, and wherein the display control unit controls thedisplay unit such that the first and second high-frequency componentimages are displayed preceding display of the first and secondlow-frequency component images.
 5. The display control apparatusaccording to claim 1, wherein the first generation unit generates thefirst and second low-frequency component images based on low-pass filterprocessing on the at least one of the obtained images, and wherein thesecond generation unit generates the first and second high-frequencycomponent images based on a difference between the at least one of theobtained images and the generated low-frequency component image frame.6. The display control apparatus according to claim 1, wherein a framerate corresponding to the input images is 60 frames per second and aframe rate corresponding to the cinema images is 24 frames per second.7. The display control apparatus according to claim 1, wherein a firstdistance between the first low-frequency component image and the firsthigh-frequency component image which correspond to the first cinemaimage and a second distance between the second low-frequency componentimage and the second high-frequency component image which correspond tothe second cinema image are different from each other.
 8. A displaycontrol method comprising: inputting images; determining whether theinput images are obtained by performing 2-3 pull down processing oncinema images; obtaining images having a higher frame rate than theinput images based on predetermined processing on the input imageframes; in a case where it has determined that the input images areobtained by performing the 2-3 pull down processing on the cinemaimages, specifying, from among a first plurality of obtained imagesbased on a first cinema image, (a) a first image used to generate afirst low-frequency component image and (b) a second image used togenerate a first high-frequency component image, and specifying, fromamong a second plurality of obtained images based on a second cinemaimage which is next to the first cinema image, (a) a third image used togenerate a second low-frequency component image and (b) a fourth imageused to generate a second high-frequency component image, wherein anumber of the first plurality of images and a number of the secondplurality of images are different from each other; generating the firstlow-frequency component image using the specified first image andgenerating the second low-frequency component image using the specifiedthird image; generating the first high-frequency component image usingthe specified second image and generating the second high-frequencycomponent image using the specified fourth image; controlling a displayunit to display a plurality of images including the generated first andsecond low-frequency component images and the generated first and secondhigh-frequency component images.
 9. The display control method accordingto claim 8, further comprising improving a frame rate of images obtainedbased on predetermined processing on the input images, wherein alow-frequency component image is generated in the generating step fromat least one of the images of which the frame rate is improved, and ahigh-frequency component image is generated in the generating step basedon at least one of images of which the frame rate is improved.
 10. Thedisplay control method according to claim 8, wherein the first andsecond low-frequency component is images are generated in the generatingstep based on low-pass filter processing on the at least one of theobtained images, and wherein the first and second high-frequencycomponent images are generated in the generating step based on adifference between the at least one of the obtained images and thegenerated low-frequency component image.
 11. The display control methodaccording to claim 8, wherein a frame rate corresponding to the inputimages is 60 frames per second and a frame rate corresponding to thecinema images is 24 frames per second.